MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRI TS FEMUR SZ6 LEFT; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Catalog Number	5512-F-601
Medical Device Problem Code	Malposition of Device (2616)
Health Effect - Clinical Codes	Injury (2348); Joint Dislocation (2374)
Date of Event	01/30/2018
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
An event regarding revision due to dislocation of a triathlon insert involving a triathlon ts femoral component was reported.The event was confirmed based on the clinician review of the medical records provided.Method & results: device evaluation and results: not performed as product was not returned.Medical records received and evaluation: clinician review of the medical records provided indicated "no examination of any explanted components except for the insert from the (b)(6) 2018 revision surgery and no primary left total knee arthroplasty operative report or list of components are available for review.The medial position of the revision tibial component and the distal position of the joint line in the revision total knee arthroplasty likely resulted in increased stress to the ts insert stability resulting in two dislocations and a later anterior implant subluxation.There is no evidence that factors of implant design, manufacturing or materials were responsible for this clinical situation".Device history review: dhr review for the reported lot determined that the device was manufactured and packed to specification.Complaint history review: there have been three other similar events for the reported lot.Conclusion: clinician review of the medical records provided indicated "no examination of any explanted components except for the insert from the (b)(6) 2018 revision surgery and no primary left total knee arthroplasty operative report or list of components are available for review.The medial position of the revision tibial component and the distal position of the joint line in the revision total knee arthroplasty likely resulted in increased stress to the ts insert stability resulting in two dislocations and a later anterior implant subluxation.There is no evidence that factors of implant design, manufacturing or materials were responsible for this clinical situation".No further investigation is required at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.
Event or Problem Description
It was reported that patient's left knee was revised due to instability.A poly swap was performed.As per consulting clinician's medical review, "the medial position of the revision tibial component and the distal position of the joint line in the revision total knee arthroplasty likely resulted in increased stress to the ts insert stability resulting in two dislocations and a later anterior implant subluxation." the consulting clinician clarified that this conclusion reflects an alignment issue of the tibial baseplate and femoral component leading toward subsequent subluxation and dislocation.

• Brand Name: TRI TS FEMUR SZ6 LEFT
• Common Device Name: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 7715252
• Report Number: 0002249697-2018-02279
• Device Sequence Number: 1328913
• Product Code: MBH
• UDI-Device Identifier: 07613327026597
• UDI-Public: 07613327026597
• Combination Product (Y/N): N
• Initial Reporter State: TN
• Initial Reporter Country: US
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• Device Explanted Year: 2018
• Reporter Type: Manufacturer
• Report Source: health professional,other
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 07/24/2018

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Operator of Device: Health Professional
• Device Expiration Date: 05/31/2021
• Device Catalogue Number: 5512-F-601
• Device Lot Number: THUV
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 06/26/2018
• Initial Report FDA Received Date: 07/24/2018
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Hospitalization; Required Intervention
• Patient Age: 77 YR
• Patient Weight: 117